Weather strip



Marth 13, 1934. J, QE 1,950,615

WEATHER STRIP Filed April 5, 19:3

////r I I r ATTORNEYS Patented Mar. 13, 31%34 rarest;

titans 6 @laims.

The invention relates to improvements in weather strips, and moreparticularly to metallic weather strips. One of the objects of theinvention is to provide a weather strip which may be readily used inconnection with window constructions having the usual sash cords for thewindow weights and yet permit of ready adjustment of the tension betweenthe parts forming the seal.

A further object of the invention is to provide an improved weatherstrip whose tension may be adjusted uniformly along the length of thestrip to insure metal to metal sliding contact at all times.

The invention further cons sts in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawing; Fig.1 is a fragmentary perspective view of a windowframe and sash embodying the invention;

Fig. 2 is a transverse sectional view through the sashes, strips andframe;

Fig. 3 is a detail fragmentary perspective view of the improved weatherstrip and its guide.

Referring to the drawing, the numeral 6 designates the window framehaving the usual guide strips 7, 8 and 9 secured thereto, the sash 10sliding between the strips 7 and 8 and the sash 11 sliding between thestrips 3 and 9. The surface 12 of the frame adjacent each sash iscrowned or curved and this permits of varying the tension of the weatherstrip hereinafter described.

The novel weather strip is formed of sheet metal which is bent toprovide a central U-shaped portion 13 having its sides 14 inclinedslightly outwardly, the sheet then being bent back to form the sides 15from which the base flanges or legs 16 extend outwardly or laterally,said legs being provided with holes 17 at spaced intervals for thereception of screws 18.

The sashes 10 and 11 each have a U-shaped longitudinally extendingrectangular groove 19 formed therein and the sides of this groove arelined with metal by the interfitting engagement therewith of theU-shaped strip 20 of sheet metal. which is secured in place by nails 210r other suitable fastening means. The sides of the strip 20 arefrictionally engaged by the sides 15 of the weather strip and thus forma good weather seal therewith.

It will be noted from the drawing that since the bases 16 of the stripare relatively flat as compared to the surface 12 and that the base (Cl.ease or web part of the U-shaped portion 13 has a bearing engagementwith the surface 12 while the sides 15 are spaced from said surface andthe sides 14 at their base portions that pressure exerted upon theflanges 16 through the screws 18 tending to draw said flanges toward thesurface 12 will tend to flex or bend the sides 14 I J varied uniformlyalong the sash.

Thus a double seal is provided between the sash and said strip theinside fold formed by thesides 14 and 15 acting inv conjunction with thesash to keep the warm air in, the outside fold formed by the other sides14 and 15 acting in conjunction with the sash to keep the cold air out,while the space 22 between the folds permits of the use of the usualsash cord 23 or its chain equivalent which does not interfere with thetension adjustment for the sash. In case a sash cord is not used, thetensioned engagement between the weather strip and the sash may berelied upon to positively hold the sash. i

I desire it to be understood that this invention is not to be limited toany'particular form or arrangement of parts except in so far as suchlimitations are included in the claims.

What I claim as my invention is:

1. The combination with a window frame, of a sash provided with alengthwise extending groove having metal lined sides, a metal sealingstrip having spaced folds, the sides of each. of said folds at theirbases being spaced apart and relatively movable, the outer side of eachfold having sliding engagement with a metal lined side of said groove,said strip having a bearing engagement with said frame between saidfolds and adapted to flex adjacent said folds, and means for flexingsaid strip to provide a ten sioned engagement between the outer side ofeach fold and the bontacting side of said groove.

2. The combination of a window frame, of a sash provided with alengthwise extending groove having metal lined sides, a metal sealingstrip having a U-shaped portion having-sides forming the inner sides offolds; the sides of each of said folds at their bases being spaced apartand relatively movable, the outer side of each fold having slidingengagement with a side are of said groove, the base of said U-shapedportion having bearing engagement with said frame between said folds,said strip adapted to flex adjacent said folds, and means for flexingsaid strip to provide a tensioned engagement between the outer side ofeach fold and the contacting side of said groove.

3. The combination with a window frame having a crowned surface adjacentthe sash, of a sash provided with a lengthwise extending groove havingmetal lined sides, a metal sealing strip havingspaced folds, the sidesof each of said folds at their bases being spaced apart and relativelymovable, the outer side of each fold having sliding engagement with aside of said groove, said strip having a base portion extendingoutwardly from the outer side of each fold and a bearing engagement withsaid frame between said folds, said strip adapted to flex adjacent saidfolds, and means engaging said base portions to vary the position of thesame relative to the crowned surface of said frame to vary the tensionedengagement between the outer,

sides of said folds and the sides of said groove.

4. The combination of a window frame having a crowned surface adjacentthe sash, of a sash provided with a lengthwise extending groove havingmetal lined sides, a metal sealing strip having a U-shaped portionhaving sides forming the inner sides of folds, the outer side of eachfold having sliding engagement with a side of said groove, said innerand outer sides of each fold at their bases being spaced from andmovable relatively to each other, said strip having a base portionextending outwardly from the outer side of each fold and a bearingengagement with the crowned surface of said frame between said folds,said strip adapted to flex adjacent said folds, and means engaging saidbase portions to vary the position of the same relative to the crownedsurface of said frame to vary the tensioned engagement between the outersides of said folds and the sides of said groove.

5. The combination of a window frame, of a sash provided with alengthwise extending groove having metal lined sides, a metal sealingstrip formed to provide a sash cord-receiving space and folded portionsforming the sides of said space, the outer part of each folded portionhaving sliding engagement with aside of said groove, the inner and outerparts of each foldedi portion being spaced apart and relatively movable,and means for flexing said strip adjacent said outer parts to tensiontheir engagement with the sides of said groove.

6. The combination with a window frame having a crowned surface adjacentthe sash, of a sash provided with a lengthwise extending groove havingmetal lined sides, a metal sealing strip formed to provide a sashcord-receiving space and folded'portions forming the sides of saidspace, the outer part of each folded portion having sliding engagementwith a side of said groove, the inner and outer parts of each foldedportion being spaced apart and relatively movable, and means including abase portion extending laterally from each outer part and cooperatingwith said crowned surface for flexing said strip to tension theengagement of the outerpart with the-side of said groove.

JOHN M. KUEBLER.

